Hello Will,
Interesting question. This is not listed in the "Technical Data Booklet". I suspect that this is so since it is very difficult to get a straight shot onto some of these studs with a torque wrench. Any change in angle or use of any swival or universal joint will cause any torque reading to be incorrect. Be sure to use the proper washers and lock nuts. Do not tighten all at once. Do it in two or three passes. I use a 14mm swival socket and a nice long extension with a 3/8" drive ratchet handle.
Joe Alexander
Blacklick, Ohio